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1
Visit the Sony Support site (see
Resources) and download the Sony memory card software. You will need to
specify your operating system. Save the file to your desktop.

2
Double-click the downloaded file to launch the installer.

3
Follow the onscreen instructions to install the Sony memory card software. Restart the computer
after completion. Once the computer starts back up, it will recognize
the Memory Stick Pro Duo when inserted into the computer's memory card
reader. You can browse the files using Windows Explorer or the installed
x-Pict Story software.

If you put the memory stick back into the camera can you see them thru the camera menu? If so your computer's SD card port may be having issues. try using the card in another computer or use the cameras USB cable to transfer the pictures from the camera to the computer if it has one. Do other memory sticks work in the computer ok? If you cannot see them in the camera either then the pictures will be corrupted and probably cannot be recovered. Then the card will need to be formatted to erase any errors on the card. Always use the camera to format a card whenever possible...Hope that helps.

I was having the same problem with my 4GB memory stick pro duo, when i took more than 50 pictures with my camera (dsc-w90) i would get the blue screen with the file error message. I'm guessing you bought the memory stick on ebay right? I bought mines there and it turns out it's a fake one. If you also bought it there then you most likely have a fake memory stick because I found out that most of the memory sticks sold on ebay are fake, to help you figure out if you have a fake one or not check out this guide or google fake memory stick pro duo.
http://reviews.ebay.com/FAKE-Sony-Memory-Stick-Pro-Duo-MagicGate-Cards-Exposed_W0QQugidZ10000000001236041